If you want to use it for a preset, then open it as a 'New layer' in GIMP, Photoshop or what ever you're using. What you then need to do is right click the canvas, go to 'Layer' then 'Multiply'.
Side notes:
Make sure that your preset is 512x512 and saved as a .PNG image.
Go into Local Disk\FeralHeart\My presets then chose the file you're using for your preset and open up the 'preset_#' material file and change all .JPG into .PNG and save.
Make sure you name your image files the same as it says on the material file.
Example:
preset_#body.png
preset_#head.png
ect...
EDIT: Please do not bump posts or double post! Someone WILL help you!